Printing-press attachment



B. MARGWARTH PRINTING PRESS ATTACHMENT Oct. 22, l929.`

Filed June 25, 1928 ILLI r INVENTOR.

BOL/VERMARGWAPTH BY af ATTORNEYS i Patented 0st. 22,

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BOLIVER MARGWARTH, 0l? MEVPRT BEACJEB, CALFORNIA PRINTING-PRESSATTACHMENT Application filed. June 25, 19529.

My invention relates to improvements in printing press attachments, andit consists in the combinations, constructions and arrangementshereinafter described and claimed.

In the Miehle vertical press, the feeder table supports a large pile ofstock ready for feeding, and this stock has the upper sheets thereofkept slightly separated from each other by a liet of air which isdirected against the edges of the sheets. Suction shoes carried by theseparator frame lift the uppermost sheets one at a time from the stockand convey them to the printingl mechanism. These shoes press down uponthe upper sheets and expel the layers of air between the sheets, thuscausing at certain times more than one sheet to be removed from thestock by the suction shoes.

llhe purpose of the present invention is to prevent the suction shoesfrom actually bearing weight on the uppermost sheet and pressing thesheet d own upon the next sheet. ln this way the layer of air betweenthe two uppermost sheets will not be disturbed, and the shoes willremove only one sheet at a time from the stock.

The invention consists of a simple attachment which is designed for theMiehle printing press, but it is obvious that the device may be changedslightly to tit presses of other constructions. The purpose of thedevice is to prevent the suction shoes from pressing down the uppermostsheet of paper.

Other objects and advantages will appear in the following specification,and the novel features of the device will be particularly pointed out inthe appended claims.

My invention is illustrated in the accompanying drawing forming a partof this application, in which Figure l is a sectional view through aportion of the Miehle printing press showingmy attachment operativelyapplied thereto;

Figure 2 is a top plan view of the attachment; Figure 3 is alongitudinal section through the device; and

Figure 4 is a perspective view of the bracket.

In carrying out my invention, I make use Serial No. 288,032.

of a feeder table l that is automatically raised by a rod 2 as the stock3 carried by the table is being depleted. Feeder arms 4 carrying suctionshoes 5 move from the stock 3 to the printing portion of the press, notshown. An air jet 6 directs air against the front edges of the uppermostsheets of the stock and keeps these upper sheets separated from eachother by layers of air.

The shoes 5 are carried by a separator frame 7, and the frame isprevented from allowing the shoes to rest nupon the upper sheet by anarm 8 (see Figure 2) that has a platform 9 bearing against the frame 7.The arm is held in a position to dispose the shoes 5 above the uppersheet, and this is accomplished by an adjustable foot 10 that is movablealong the arm 8 and is secured in adjusted position by means of a setscrew 11.

The endof the arm 8 opposite tothat of the platform 9 is threaded as at12 and carries lock nuts 13. The threaded portion is received inopening` 24 in bracket 25. The bracket 25 is secured to a cross rod 14by means of a clamp 1'?.

From the foregoing description of the various parts of the device, theoperation thereof may be readily understood.

During the normal operation of the machine, the arms 4 swing back andforth carrying a sheet each time they swing to the left when lookingl atFigure 1. The frame 7 and the shoes 5 are carried by the arms. Each timethe arms 4 come to rest at the eXtreme right of their swing, the frame 7is supported by the platform 9 in a position to prevent the shoes fromactually putting pressure on the uppermost sheet. Of course, suction isbeing applied to the shoes at all times by means of the flexible pipes15 which communicate with a suction pipe 1G. The upper sheetsareseparated, from each other by the air iiowing through the air jet 6.There will therefore be a layer of air between the two uppermost sheets,and when the` shoes come in contact with the uppermost sheet, it willnot carry the sheet disposed therebeneath. This simple expedient permitsonly one sheet to be fed to the press at a time.

The weight of the shoes, instead of being carried by the front edges ofthe uppermost sheets, is carried by the foot 10 which rests upon thestock. This foot is spaced far enough aWay from the front to permit thefront edges to be kept separated from each other by the air flowing fromthe pipe 6.

The device is also adapted to handle envelopes. The distance the shoesgo down governs the automatic raising of the pile of paper. As envelopesare soft and fluffy, the shoes bear so heavily upon them that the stackof envelopes keeps on raising clear out ofthe holder. I/Vith myinvention the bar 10 takes up the pressure and the envelopes do not comeup too high. As the pile lowers, so do the bar 10 and the shoes.Consequently, the automatic lifter (not shown) starts to operate andraises the envelopes and bar 10. With the handling of envelopes, the bar10 has more surface than the two shoes, consequently the pressureisdistributed over more surface. The invention is very important in bothuses. Envelopes cannot be fed at all on the standard Miehle press now.

Although I have shown and described one embodiment of my invention, itis to be understood that the same is susceptible of various changes, andI reserve the right to employ'sueh changes as may come Within the scopeof the appended claims.

I claim:

` l. A device of the type described comprisingan arm, a platform carriedby one end of said arm, and a foot adjustable on said arm. i

2. A device of the type described comprising'an arm, a platform carriedby one end ofsaid arm, and a foot adjustable on said arm, the oppositeend of ysaid arm being threaded and carrying a lock nut.

, 3. The combination with a printing press of the vertical type having astock-carrying feeder table, suction shoes, and arms for moving saidshoes to and from said stock, of a stationary arm for supporting saidshoes and for spacing them from said stock, and a foot adjustablysecured to said arm and bearing against the stock.

4. The combination With a printing press having suction shoes forremoving one sheet at a time from the stock, of a stationary arm forsupporting said shoes and for spacing them from `the stock, and a membercarried by said arm and transversely bearing against the stock, saidmember being disposed rear- Wardly of said shoes. l

5. The combination with a printing press having a stock-carrying table,suction shoes. and means for moving said shoes to and from the stock, ofa stationary arm for supporting said shoes and for spacing them from thestock, and a laterally-extending member earried by saidstationary armand being adjustable along the length of said arm, said memberbearingagainst said stock.

